Merge cantab.net:/usr/src/bklinux-2.5 into cantab.net:/usr/src/tng

Documentation/filesystems/porting

@@ -3,11 +3,13 @@ Changes since 2.5.0:
 --- 
 [recommended]
 
-New helpers: sb_bread(), sb_getblk(), sb_get_hash_table(), set_bh(),
+New helpers: sb_bread(), sb_getblk(), sb_find_get_block(), set_bh(),
 	sb_set_blocksize() and sb_min_blocksize().
 
 Use them.
 
+(sb_find_get_block() replaces 2.4's get_hash_table())
+
 --- 
 [recommended]
 
@@ -228,3 +230,21 @@ anything from oops to silent memory corruption.
 	Use bdev_read_only(bdev) instead of is_read_only(kdev).  The latter
 is still alive, but only because of the mess in drivers/s390/block/dasd.c.
 As soon as it gets fixed is_read_only() will die.
+
+---
+[mandatory]
+
+	is_read_only() is gone; use bdev_read_only() instead.
+
+---
+[mandatory]
+
+	destroy_buffers() is gone; use invalidate_bdev().
+
+---
+[mandatory]
+
+	fsync_dev() is gone; use fsync_bdev().  NOTE: lvm breakage is
+deliberate; as soon as struct block_device * is propagated in a reasonable
+way by that code fixing will become trivial; until then nothing can be
+done.

arch/i386/mm/fault.c

@@ -56,12 +56,16 @@ int __verify_write(const void * addr, unsigned long size)
 
 	for (;;) {
 	survive:
-		{
-			int fault = handle_mm_fault(current->mm, vma, start, 1);
-			if (!fault)
+		switch (handle_mm_fault(current->mm, vma, start, 1)) {
+			case VM_FAULT_SIGBUS:
 				goto bad_area;
-			if (fault < 0)
+			case VM_FAULT_OOM:
 				goto out_of_memory;
+			case VM_FAULT_MINOR:
+			case VM_FAULT_MAJOR:
+				break;
+			default:
+				BUG();
 		}
 		if (!size)
 			break;
@@ -239,16 +243,18 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
 	 * the fault.
 	 */
 	switch (handle_mm_fault(mm, vma, address, write)) {
-	case 1:
-		tsk->min_flt++;
-		break;
-	case 2:
-		tsk->maj_flt++;
-		break;
-	case 0:
-		goto do_sigbus;
-	default:
-		goto out_of_memory;
+		case VM_FAULT_MINOR:
+			tsk->min_flt++;
+			break;
+		case VM_FAULT_MAJOR:
+			tsk->maj_flt++;
+			break;
+		case VM_FAULT_SIGBUS:
+			goto do_sigbus;
+		case VM_FAULT_OOM:
+			goto out_of_memory;
+		default:
+			BUG();
 	}
 
 	/*

arch/sparc/kernel/signal.c

@@ -1090,7 +1090,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
 
 #ifdef DEBUG_SIGNALS_MAPS
 
-#define MAPS_LINE_FORMAT	  "%08lx-%08lx %s %08lx %s %lu "
+#define MAPS_LINE_FORMAT	  "%08lx-%08lx %s %08lx %02x:%02x %lu "
 
 static inline void read_maps (void)
 {
@@ -1107,7 +1107,7 @@ static inline void read_maps (void)
 		char *line;
 		char str[5], *cp = str;
 		int flags;
-		kdev_t dev;
+		dev_t dev;
 		unsigned long ino;
 
 		/*
@@ -1132,7 +1132,7 @@ static inline void read_maps (void)
 				      buffer, PAGE_SIZE);
 		}
 		printk(MAPS_LINE_FORMAT, map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
-			      kdevname(dev), ino);
+			      MAJOR(dev), MINOR(dev), ino);
 		if (map->vm_file != NULL)
 			printk("%s\n", line);
 		else

arch/sparc64/kernel/signal.c

@@ -633,7 +633,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
 
 #ifdef DEBUG_SIGNALS_MAPS
 
-#define MAPS_LINE_FORMAT	  "%016lx-%016lx %s %016lx %s %lu "
+#define MAPS_LINE_FORMAT	  "%016lx-%016lx %s %016lx %02x:%02x %lu "
 
 static inline void read_maps (void)
 {
@@ -650,7 +650,7 @@ static inline void read_maps (void)
 		char *line;
 		char str[5], *cp = str;
 		int flags;
-		kdev_t dev;
+		dev_t dev;
 		unsigned long ino;
 
 		/*
@@ -675,7 +675,7 @@ static inline void read_maps (void)
 				      buffer, PAGE_SIZE);
 		}
 		printk(MAPS_LINE_FORMAT, map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
-			      kdevname(dev), ino);
+			      MAJOR(dev), MINOR(dev), ino);
 		if (map->vm_file != NULL)
 			printk("%s\n", line);
 		else

arch/sparc64/kernel/signal32.c

@@ -1319,7 +1319,7 @@ static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs
 
 #ifdef DEBUG_SIGNALS_MAPS
 
-#define MAPS_LINE_FORMAT	  "%016lx-%016lx %s %016lx %s %lu "
+#define MAPS_LINE_FORMAT	  "%016lx-%016lx %s %016lx %02x:%02x %lu "
 
 static inline void read_maps (void)
 {
@@ -1336,7 +1336,7 @@ static inline void read_maps (void)
 		char *line;
 		char str[5], *cp = str;
 		int flags;
-		kdev_t dev;
+		dev_t dev;
 		unsigned long ino;
 
 		/*
@@ -1361,7 +1361,7 @@ static inline void read_maps (void)
 				      buffer, PAGE_SIZE);
 		}
 		printk(MAPS_LINE_FORMAT, map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
-			      kdevname(dev), ino);
+			      MAJOR(dev), MINOR(dev), ino);
 		if (map->vm_file != NULL)
 			printk("%s\n", line);
 		else

drivers/block/ll_rw_blk.c

@@ -964,8 +964,7 @@ void blk_run_queues(void)
 		return;
 	}
 
-	list_splice(&blk_plug_list, &local_plug_list);
-	INIT_LIST_HEAD(&blk_plug_list);
+	list_splice_init(&blk_plug_list, &local_plug_list);
 	spin_unlock_irq(&blk_plug_lock);
 	
 	while (!list_empty(&local_plug_list)) {
@@ -1212,21 +1211,19 @@ void blk_put_request(struct request *rq)
 
 static long ro_bits[MAX_BLKDEV][8];
 
-int is_read_only(kdev_t dev)
+int bdev_read_only(struct block_device *bdev)
 {
 	int minor,major;
 
-	major = major(dev);
-	minor = minor(dev);
-	if (major < 0 || major >= MAX_BLKDEV) return 0;
+	if (!bdev)
+		return 0;
+	major = MAJOR(bdev->bd_dev);
+	minor = MINOR(bdev->bd_dev);
+	if (major < 0 || major >= MAX_BLKDEV)
+		return 0;
 	return ro_bits[major][minor >> 5] & (1 << (minor & 31));
 }
 
-int bdev_read_only(struct block_device *bdev)
-{
-	return bdev && is_read_only(to_kdev_t(bdev->bd_dev));
-}
-
 void set_device_ro(kdev_t dev,int flag)
 {
 	int minor,major;

drivers/cdrom/cdrom.c

@@ -318,8 +318,9 @@ static void sanitize_format(union cdrom_addr *addr,
 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
 		     unsigned long arg);
 
-int cdrom_get_last_written(kdev_t dev, long *last_written);
-int cdrom_get_next_writable(kdev_t dev, long *next_writable);
+int cdrom_get_last_written(struct cdrom_device_info *, long *);
+static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
+static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
 
 #ifdef CONFIG_SYSCTL
 static void cdrom_sysctl_register(void);
@@ -441,7 +442,7 @@ int unregister_cdrom(struct cdrom_device_info *unreg)
 	return 0;
 }
 
-struct cdrom_device_info *cdrom_find_device(kdev_t dev)
+static struct cdrom_device_info *cdrom_find_device(kdev_t dev)
 {
 	struct cdrom_device_info *cdi;
 
@@ -780,7 +781,7 @@ static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
 	return cdi->ops->generic_packet(cdi, &cgc);
 }
 
-int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
+static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
 {
 	struct cdrom_changer_info info;
 	int curslot;
@@ -864,7 +865,7 @@ int cdrom_media_changed(kdev_t dev)
 }
 
 /* badly broken, I know. Is due for a fixup anytime. */
-void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
+static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
 {
 	struct cdrom_tochdr header;
 	struct cdrom_tocentry entry;
@@ -1926,7 +1927,6 @@ static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
 {		
 	struct cdrom_device_ops *cdo = cdi->ops;
 	struct cdrom_generic_command cgc;
-	kdev_t dev = cdi->dev;
 	char buffer[32];
 	int ret = 0;
 
@@ -2198,7 +2198,7 @@ static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
 	case CDROM_NEXT_WRITABLE: {
 		long next = 0;
 		cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 
-		if ((ret = cdrom_get_next_writable(dev, &next)))
+		if ((ret = cdrom_get_next_writable(cdi, &next)))
 			return ret;
 		IOCTL_OUT(arg, long, next);
 		return 0;
@@ -2206,7 +2206,7 @@ static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
 	case CDROM_LAST_WRITTEN: {
 		long last = 0;
 		cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 
-		if ((ret = cdrom_get_last_written(dev, &last)))
+		if ((ret = cdrom_get_last_written(cdi, &last)))
 			return ret;
 		IOCTL_OUT(arg, long, last);
 		return 0;
@@ -2216,10 +2216,9 @@ static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
 	return -ENOTTY;
 }
 
-int cdrom_get_track_info(kdev_t dev, __u16 track, __u8 type,
+static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
 			 track_information *ti)
 {
-        struct cdrom_device_info *cdi = cdrom_find_device(dev);
 	struct cdrom_device_ops *cdo = cdi->ops;
 	struct cdrom_generic_command cgc;
 	int ret;
@@ -2246,9 +2245,8 @@ int cdrom_get_track_info(kdev_t dev, __u16 track, __u8 type,
 }
 
 /* requires CD R/RW */
-int cdrom_get_disc_info(kdev_t dev, disc_information *di)
+static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
 {
-	struct cdrom_device_info *cdi = cdrom_find_device(dev);
 	struct cdrom_device_ops *cdo = cdi->ops;
 	struct cdrom_generic_command cgc;
 	int ret;
@@ -2278,9 +2276,8 @@ int cdrom_get_disc_info(kdev_t dev, disc_information *di)
 
 /* return the last written block on the CD-R media. this is for the udf
    file system. */
-int cdrom_get_last_written(kdev_t dev, long *last_written)
-{	
-	struct cdrom_device_info *cdi = cdrom_find_device(dev);
+int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
+{
 	struct cdrom_tocentry toc;
 	disc_information di;
 	track_information ti;
@@ -2290,17 +2287,17 @@ int cdrom_get_last_written(kdev_t dev, long *last_written)
 	if (!CDROM_CAN(CDC_GENERIC_PACKET))
 		goto use_toc;
 
-	if ((ret = cdrom_get_disc_info(dev, &di)))
+	if ((ret = cdrom_get_disc_info(cdi, &di)))
 		goto use_toc;
 
 	last_track = (di.last_track_msb << 8) | di.last_track_lsb;
-	if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+	if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
 		goto use_toc;
 
 	/* if this track is blank, try the previous. */
 	if (ti.blank) {
 		last_track--;
-		if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+		if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
 			goto use_toc;
 	}
 
@@ -2330,9 +2327,8 @@ int cdrom_get_last_written(kdev_t dev, long *last_written)
 }
 
 /* return the next writable block. also for udf file system. */
-int cdrom_get_next_writable(kdev_t dev, long *next_writable)
+static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
 {
-	struct cdrom_device_info *cdi = cdrom_find_device(dev);
 	disc_information di;
 	track_information ti;
 	__u16 last_track;
@@ -2341,17 +2337,17 @@ int cdrom_get_next_writable(kdev_t dev, long *next_writable)
 	if (!CDROM_CAN(CDC_GENERIC_PACKET))
 		goto use_last_written;
 
-	if ((ret = cdrom_get_disc_info(dev, &di)))
+	if ((ret = cdrom_get_disc_info(cdi, &di)))
 		goto use_last_written;
 
 	last_track = (di.last_track_msb << 8) | di.last_track_lsb;
-	if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+	if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
 		goto use_last_written;
 
         /* if this track is blank, try the previous. */
 	if (ti.blank) {
 		last_track--;
-		if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+		if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
 			goto use_last_written;
 	}
 
@@ -2364,7 +2360,7 @@ int cdrom_get_next_writable(kdev_t dev, long *next_writable)
 	return 0;
 
 use_last_written:
-	if ((ret = cdrom_get_last_written(dev, next_writable))) {
+	if ((ret = cdrom_get_last_written(cdi, next_writable))) {
 		*next_writable = 0;
 		return ret;
 	} else {
@@ -2373,11 +2369,7 @@ int cdrom_get_next_writable(kdev_t dev, long *next_writable)
 	}
 }
 
-EXPORT_SYMBOL(cdrom_get_disc_info);
-EXPORT_SYMBOL(cdrom_get_track_info);
-EXPORT_SYMBOL(cdrom_get_next_writable);
 EXPORT_SYMBOL(cdrom_get_last_written);
-EXPORT_SYMBOL(cdrom_count_tracks);
 EXPORT_SYMBOL(register_cdrom);
 EXPORT_SYMBOL(unregister_cdrom);
 EXPORT_SYMBOL(cdrom_open);
@@ -2385,11 +2377,9 @@ EXPORT_SYMBOL(cdrom_release);
 EXPORT_SYMBOL(cdrom_ioctl);
 EXPORT_SYMBOL(cdrom_media_changed);
 EXPORT_SYMBOL(cdrom_number_of_slots);
-EXPORT_SYMBOL(cdrom_select_disc);
 EXPORT_SYMBOL(cdrom_mode_select);
 EXPORT_SYMBOL(cdrom_mode_sense);
 EXPORT_SYMBOL(init_cdrom_command);
-EXPORT_SYMBOL(cdrom_find_device);
 
 #ifdef CONFIG_SYSCTL
 

drivers/char/pty.c

@@ -25,8 +25,6 @@
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #include <asm/bitops.h>
-
-#define BUILDING_PTY_C 1
 #include <linux/devpts_fs.h>
 
 struct pty_struct {

drivers/char/tty_io.c

@@ -1336,7 +1336,7 @@ static int tty_open(struct inode * inode, struct file * filp)
 	ptmx_found:
 		set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
 		minor -= driver->minor_start;
-		devpts_pty_new(driver->other->name_base + minor, mk_kdev(driver->other->major, minor + driver->other->minor_start));
+		devpts_pty_new(driver->other->name_base + minor, MKDEV(driver->other->major, minor + driver->other->minor_start));
 		tty_register_devfs(&pts_driver[major], DEVFS_FL_DEFAULT,
 				   pts_driver[major].minor_start + minor);
 		noctty = 1;

drivers/ide/ide-cd.c

@@ -1937,9 +1937,9 @@ static int cdrom_read_tocentry(struct ata_device *drive, int trackno, int msf_fl
 /* Try to read the entire TOC for the disk into our internal buffer. */
 static int cdrom_read_toc(struct ata_device *drive, struct request_sense *sense)
 {
-	int minor, stat, ntracks, i;
-	kdev_t dev;
+	int stat, ntracks, i;
 	struct cdrom_info *info = drive->driver_data;
+	struct cdrom_device_info *cdi = &info->devinfo;
 	struct atapi_toc *toc = info->toc;
 	struct {
 		struct atapi_toc_header hdr;
@@ -2071,10 +2071,8 @@ static int cdrom_read_toc(struct ata_device *drive, struct request_sense *sense)
 	toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
 
 	/* Now try to get the total cdrom capacity. */
-	minor = (drive->select.b.unit) << PARTN_BITS;
-	dev = mk_kdev(drive->channel->major, minor);
 	/* FIXME: This is making worng assumptions about register layout. */
-	stat = cdrom_get_last_written(dev, (unsigned long *) &toc->capacity);
+	stat = cdrom_get_last_written(cdi, (unsigned long *) &toc->capacity);
 	if (stat)
 		stat = cdrom_read_capacity(drive, &toc->capacity, sense);
 	if (stat)

drivers/ieee1394/ieee1394_core.c

@@ -740,8 +740,7 @@ void abort_requests(struct hpsb_host *host)
         host->ops->devctl(host, CANCEL_REQUESTS, 0);
 
         spin_lock_irqsave(&host->pending_pkt_lock, flags);
-        list_splice(&host->pending_packets, &llist);
-        INIT_LIST_HEAD(&host->pending_packets);
+        list_splice_init(&host->pending_packets, &llist);
         spin_unlock_irqrestore(&host->pending_pkt_lock, flags);
 
         list_for_each(lh, &llist) {

drivers/md/linear.c

@@ -60,7 +60,6 @@ static int linear_run (mddev_t *mddev)
 			goto out;
 		}
 
-		disk->dev = rdev->dev;
 		disk->bdev = rdev->bdev;
 		atomic_inc(&rdev->bdev->bd_count);
 		disk->size = rdev->size;
@@ -163,7 +162,7 @@ static int linear_make_request (request_queue_t *q, struct bio *bio)
     
 	if (block >= (tmp_dev->size + tmp_dev->offset)
 				|| block < tmp_dev->offset) {
-		printk ("linear_make_request: Block %ld out of bounds on dev %s size %ld offset %ld\n", block, kdevname(tmp_dev->dev), tmp_dev->size, tmp_dev->offset);
+		printk ("linear_make_request: Block %ld out of bounds on dev %s size %ld offset %ld\n", block, bdevname(tmp_dev->bdev), tmp_dev->size, tmp_dev->offset);
 		bio_io_error(bio);
 		return 0;
 	}
@@ -186,11 +185,11 @@ static int linear_status (char *page, mddev_t *mddev)
 	for (j = 0; j < conf->nr_zones; j++)
 	{
 		sz += sprintf(page+sz, "[%s",
-			partition_name(conf->hash_table[j].dev0->dev));
+			bdev_partition_name(conf->hash_table[j].dev0->bdev));
 
 		if (conf->hash_table[j].dev1)
 			sz += sprintf(page+sz, "/%s] ",
-			  partition_name(conf->hash_table[j].dev1->dev));
+			  bdev_partition_name(conf->hash_table[j].dev1->bdev));
 		else
 			sz += sprintf(page+sz, "] ");
 	}

drivers/net/3c59x.c

@@ -174,6 +174,10 @@
     - Add `global_options' as default for options[].  Ditto global_enable_wol,
       global_full_duplex.
 
+   LK1.1.18 01Jul02 akpm
+    - Fix for undocumented transceiver power-up bit on some 3c566B's
+      (Donald Becker, Rahul Karnik)
+
     - See http://www.zip.com.au/~akpm/linux/#3c59x-2.3 for more details.
     - Also see Documentation/networking/vortex.txt
 */
@@ -189,8 +193,8 @@
 
 
 #define DRV_NAME	"3c59x"
-#define DRV_VERSION	"LK1.1.17"
-#define DRV_RELDATE	"18 Dec 2001"
+#define DRV_VERSION	"LK1.1.18"
+#define DRV_RELDATE	"1 Jul 2002"
 
 
 
@@ -414,7 +418,7 @@ enum {	IS_VORTEX=1, IS_BOOMERANG=2, IS_CYCLONE=4, IS_TORNADO=8,
 	EEPROM_8BIT=0x10,	/* AKPM: Uses 0x230 as the base bitmaps for EEPROM reads */
 	HAS_PWR_CTRL=0x20, HAS_MII=0x40, HAS_NWAY=0x80, HAS_CB_FNS=0x100,
 	INVERT_MII_PWR=0x200, INVERT_LED_PWR=0x400, MAX_COLLISION_RESET=0x800,
-	EEPROM_OFFSET=0x1000, HAS_HWCKSM=0x2000 };
+	EEPROM_OFFSET=0x1000, HAS_HWCKSM=0x2000, WNO_XCVR_PWR=0x4000 };
 
 enum vortex_chips {
 	CH_3C590 = 0,
@@ -522,7 +526,7 @@ static struct vortex_chip_info {
 									HAS_HWCKSM, 128, },
 	{"3c556B Laptop Hurricane",
 	 PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|EEPROM_OFFSET|HAS_CB_FNS|INVERT_MII_PWR|
-									HAS_HWCKSM, 128, },
+	                                WNO_XCVR_PWR|HAS_HWCKSM, 128, },
 	{"3c575 [Megahertz] 10/100 LAN 	CardBus",
 	PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_8BIT, 128, },
 
@@ -1222,6 +1226,10 @@ static int __devinit vortex_probe1(struct pci_dev *pdev,
 		if (vp->drv_flags & INVERT_MII_PWR)
 			n |= 0x4000;
 		outw(n, ioaddr + Wn2_ResetOptions);
+		if (vp->drv_flags & WNO_XCVR_PWR) {
+			EL3WINDOW(0);
+			outw(0x0800, ioaddr);
+		}
 	}
 
 	/* Extract our information from the EEPROM data. */

drivers/net/e100/e100.h

@@ -1031,14 +1031,6 @@ extern unsigned char e100_selftest(struct e100_private *bdp, u32 *st_timeout,
 extern unsigned char e100_get_link_state(struct e100_private *bdp);
 extern unsigned char e100_wait_scb(struct e100_private *bdp);
 
-#ifndef yield
-#define yield()					\
-        do {					\
-                current->policy |= SCHED_YIELD;	\
-                schedule();			\
-        } while (0)                                     
-#endif
-
 extern void e100_deisolate_driver(struct e100_private *bdp,
 				  u8 recover, u8 full_reset);
 extern unsigned char e100_hw_reset_recover(struct e100_private *bdp,

drivers/pci/pool.c

@@ -303,15 +303,15 @@ pci_pool_free (struct pci_pool *pool, void *vaddr, dma_addr_t dma)
 
 #ifdef	CONFIG_DEBUG_SLAB
 	if (((dma - page->dma) + (void *)page->vaddr) != vaddr) {
-		printk (KERN_ERR "pci_pool_free %s/%s, %p (bad vaddr)/%lx\n",
+		printk (KERN_ERR "pci_pool_free %s/%s, %p (bad vaddr)/%Lx\n",
 			pool->dev ? pool->dev->slot_name : NULL,
-			pool->name, vaddr, (unsigned long) dma);
+			pool->name, vaddr, (unsigned long long) dma);
 		return;
 	}
 	if (page->bitmap [map] & (1UL << block)) {
-		printk (KERN_ERR "pci_pool_free %s/%s, dma %x already free\n",
+		printk (KERN_ERR "pci_pool_free %s/%s, dma %Lx already free\n",
 			pool->dev ? pool->dev->slot_name : NULL,
-			pool->name, dma);
+			pool->name, (unsigned long long)dma);
 		return;
 	}
 	memset (vaddr, POOL_POISON_BYTE, pool->size);

drivers/scsi/scsi.c

@@ -2467,7 +2467,9 @@ struct scatterlist *scsi_alloc_sgtable(Scsi_Cmnd *SCpnt, int gfp_mask)
 
 	sgp = scsi_sg_pools + SCpnt->sglist_len;
 
+	current->flags |= PF_NOWARN;
 	sgl = mempool_alloc(sgp->pool, gfp_mask);
+	current->flags &= ~PF_NOWARN;
 	if (sgl) {
 		memset(sgl, 0, sgp->size);
 		return sgl;

drivers/scsi/scsi_merge.c

@@ -74,8 +74,10 @@ int scsi_init_io(Scsi_Cmnd *SCpnt)
 	SCpnt->use_sg = count;
 
 	gfp_mask = GFP_NOIO;
-	if (in_interrupt())
+	if (in_interrupt()) {
 		gfp_mask &= ~__GFP_WAIT;
+		gfp_mask |= __GFP_HIGH;
+	}
 
 	/*
 	 * if sg table allocation fails, requeue request later.

drivers/scsi/sr.c

@@ -522,8 +522,8 @@ void get_sectorsize(int i)
 		SCp->needs_sector_size = 1;
 	} else {
 #if 0
-		if (cdrom_get_last_written(mkdev(MAJOR_NR, i),
-					   &scsi_CDs[i].capacity))
+		if (cdrom_get_last_written(&SCp->cdi,
+					   &SCp->capacity))
 #endif
 			SCp->capacity = 1 + ((buffer[0] << 24) |
 						    (buffer[1] << 16) |

fs/Makefile

@@ -40,6 +40,7 @@ obj-$(CONFIG_QUOTACTL)		+= quota.o
 obj-$(CONFIG_PROC_FS)		+= proc/
 obj-y				+= partitions/
 obj-y				+= driverfs/
+obj-y				+= devpts/
 
 # Do not add any filesystems before this line
 obj-$(CONFIG_EXT3_FS)		+= ext3/ # Before ext2 so root fs can be ext3
@@ -81,7 +82,6 @@ obj-$(CONFIG_AUTOFS_FS)		+= autofs/
 obj-$(CONFIG_AUTOFS4_FS)	+= autofs4/
 obj-$(CONFIG_ADFS_FS)		+= adfs/
 obj-$(CONFIG_REISERFS_FS)	+= reiserfs/
-obj-$(CONFIG_DEVPTS_FS)		+= devpts/
 obj-$(CONFIG_SUN_OPENPROMFS)	+= openpromfs/
 obj-$(CONFIG_JFS_FS)		+= jfs/
 

fs/bio.c

@@ -135,21 +135,26 @@ inline void bio_init(struct bio *bio)
  **/
 struct bio *bio_alloc(int gfp_mask, int nr_iovecs)
 {
-	struct bio *bio = mempool_alloc(bio_pool, gfp_mask);
+	struct bio *bio;
 	struct bio_vec *bvl = NULL;
 
+	current->flags |= PF_NOWARN;
+	bio = mempool_alloc(bio_pool, gfp_mask);
 	if (unlikely(!bio))
-		return NULL;
+		goto out;
 
 	if (!nr_iovecs || (bvl = bvec_alloc(gfp_mask,nr_iovecs,&bio->bi_max))) {
 		bio_init(bio);
 		bio->bi_destructor = bio_destructor;
 		bio->bi_io_vec = bvl;
-		return bio;
+		goto out;
 	}
 
 	mempool_free(bio, bio_pool);
-	return NULL;
+	bio = NULL;
+out:
+	current->flags &= ~PF_NOWARN;
+	return bio;
 }
 
 /**

fs/block_dev.c

@@ -23,8 +23,6 @@
 
 #include <asm/uaccess.h>
 
-#define MAX_BUF_PER_PAGE (PAGE_CACHE_SIZE / 512)
-
 static unsigned long max_block(struct block_device *bdev)
 {
 	unsigned int retval = ~0U;
@@ -299,7 +297,6 @@ struct block_device *bdget(dev_t dev)
 			new_bdev->bd_inode = inode;
 			inode->i_mode = S_IFBLK;
 			inode->i_rdev = kdev;
-			inode->i_dev = kdev;
 			inode->i_bdev = new_bdev;
 			inode->i_data.a_ops = &def_blk_aops;
 			inode->i_data.gfp_mask = GFP_USER;

fs/buffer.c

@@ -36,6 +36,8 @@
 #include <linux/buffer_head.h>
 #include <asm/bitops.h>
 
+static void invalidate_bh_lrus(void);
+
 #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
 
 /*
@@ -243,22 +245,6 @@ int fsync_bdev(struct block_device *bdev)
 	return sync_blockdev(bdev);
 }
 
-/*
- * Write out and wait upon all dirty data associated with this
- * kdev_t.   Filesystem data as well as the underlying block
- * device.  Takes the superblock lock.
- */
-int fsync_dev(kdev_t dev)
-{
-	struct block_device *bdev = bdget(kdev_t_to_nr(dev));
-	if (bdev) {
-		int res = fsync_bdev(bdev);
-		bdput(bdev);
-		return res;
-	}
-	return 0;
-}
-
 /*
  * sync everything.
  */
@@ -389,7 +375,7 @@ asmlinkage long sys_fdatasync(unsigned int fd)
  * private_lock is contended then so is mapping->page_lock).
  */
 struct buffer_head *
-__find_get_block(struct block_device *bdev, sector_t block, int unused)
+__find_get_block_slow(struct block_device *bdev, sector_t block, int unused)
 {
 	struct inode *bd_inode = bdev->bd_inode;
 	struct address_space *bd_mapping = bd_inode->i_mapping;
@@ -459,12 +445,15 @@ __find_get_block(struct block_device *bdev, sector_t block, int unused)
    pass does the actual I/O. */
 void invalidate_bdev(struct block_device *bdev, int destroy_dirty_buffers)
 {
+	invalidate_bh_lrus();
 	/*
 	 * FIXME: what about destroy_dirty_buffers?
 	 * We really want to use invalidate_inode_pages2() for
 	 * that, but not until that's cleaned up.
 	 */
+	current->flags |= PF_INVALIDATE;
 	invalidate_inode_pages(bdev->bd_inode);
+	current->flags &= ~PF_INVALIDATE;
 }
 
 void __invalidate_buffers(kdev_t dev, int destroy_dirty_buffers)
@@ -489,7 +478,6 @@ static void free_more_memory(void)
 	wakeup_bdflush();
 	try_to_free_pages(zone, GFP_NOFS, 0);
 	blk_run_queues();
-	__set_current_state(TASK_RUNNING);
 	yield();
 }
 
@@ -961,7 +949,9 @@ create_buffers(struct page * page, unsigned long size, int retry)
 	head = NULL;
 	offset = PAGE_SIZE;
 	while ((offset -= size) >= 0) {
+		current->flags |= PF_NOWARN;
 		bh = alloc_buffer_head();
+		current->flags &= ~PF_NOWARN;
 		if (!bh)
 			goto no_grow;
 
@@ -1159,7 +1149,7 @@ grow_buffers(struct block_device *bdev, unsigned long block, int size)
  * attempt is failing.  FIXME, perhaps?
  */
 struct buffer_head *
-__getblk(struct block_device *bdev, sector_t block, int size)
+__getblk_slow(struct block_device *bdev, sector_t block, int size)
 {
 	for (;;) {
 		struct buffer_head * bh;
@@ -1259,7 +1249,8 @@ void __bforget(struct buffer_head *bh)
  *  Reads a specified block, and returns buffer head that contains it.
  *  It returns NULL if the block was unreadable.
  */
-struct buffer_head * __bread(struct block_device *bdev, int block, int size)
+struct buffer_head *
+__bread_slow(struct block_device *bdev, sector_t block, int size)
 {
 	struct buffer_head *bh = __getblk(bdev, block, size);
 
@@ -1283,6 +1274,165 @@ struct buffer_head * __bread(struct block_device *bdev, int block, int size)
 	return NULL;
 }
 
+/*
+ * Per-cpu buffer LRU implementation.  To reduce the cost of __find_get_block().
+ * The bhs[] array is sorted - newest buffer is at bhs[0].  Buffers have their
+ * refcount elevated by one when they're in an LRU.  A buffer can only appear
+ * once in a particular CPU's LRU.  A single buffer can be present in multiple
+ * CPU's LRUs at the same time.
+ *
+ * This is a transparent caching front-end to sb_bread(), sb_getblk() and
+ * sb_find_get_block().
+ */
+
+#define BH_LRU_SIZE	7
+
+static struct bh_lru {
+	spinlock_t lock;
+	struct buffer_head *bhs[BH_LRU_SIZE];
+} ____cacheline_aligned_in_smp bh_lrus[NR_CPUS];
+
+/*
+ * The LRU management algorithm is dopey-but-simple.  Sorry.
+ */
+static void bh_lru_install(struct buffer_head *bh)
+{
+	struct buffer_head *evictee = NULL;
+	struct bh_lru *lru;
+
+	if (bh == NULL)
+		return;
+
+	lru = &bh_lrus[get_cpu()];
+	spin_lock(&lru->lock);
+	if (lru->bhs[0] != bh) {
+		struct buffer_head *bhs[BH_LRU_SIZE];
+		int in;
+		int out = 0;
+
+		get_bh(bh);
+		bhs[out++] = bh;
+		for (in = 0; in < BH_LRU_SIZE; in++) {
+			struct buffer_head *bh2 = lru->bhs[in];
+
+			if (bh2 == bh) {
+				__brelse(bh2);
+			} else {
+				if (out >= BH_LRU_SIZE) {
+					BUG_ON(evictee != NULL);
+					evictee = bh2;
+				} else {
+					bhs[out++] = bh2;
+				}
+			}
+		}
+		while (out < BH_LRU_SIZE)
+			bhs[out++] = NULL;
+		memcpy(lru->bhs, bhs, sizeof(bhs));
+	}
+	spin_unlock(&lru->lock);
+	put_cpu();
+
+	if (evictee) {
+		touch_buffer(evictee);
+		__brelse(evictee);
+	}
+}
+
+static inline struct buffer_head *
+lookup_bh(struct block_device *bdev, sector_t block, int size)
+{
+	struct buffer_head *ret = NULL;
+	struct bh_lru *lru;
+	int i;
+
+	lru = &bh_lrus[get_cpu()];
+	spin_lock(&lru->lock);
+	for (i = 0; i < BH_LRU_SIZE; i++) {
+		struct buffer_head *bh = lru->bhs[i];
+
+		if (bh && bh->b_bdev == bdev &&
+				bh->b_blocknr == block && bh->b_size == size) {
+			if (i) {
+				while (i) {
+					lru->bhs[i] = lru->bhs[i - 1];
+					i--;
+				}
+				lru->bhs[0] = bh;
+			}
+			get_bh(bh);
+			ret = bh;
+			break;
+		}
+	}
+	spin_unlock(&lru->lock);
+	put_cpu();
+	return ret;
+}
+
+struct buffer_head *
+__find_get_block(struct block_device *bdev, sector_t block, int size)
+{
+	struct buffer_head *bh = lookup_bh(bdev, block, size);
+
+	if (bh == NULL) {
+		bh = __find_get_block_slow(bdev, block, size);
+		bh_lru_install(bh);
+	}
+	return bh;
+}
+EXPORT_SYMBOL(__find_get_block);
+
+struct buffer_head *
+__getblk(struct block_device *bdev, sector_t block, int size)
+{
+	struct buffer_head *bh = __find_get_block(bdev, block, size);
+
+	if (bh == NULL) {
+		bh = __getblk_slow(bdev, block, size);
+		bh_lru_install(bh);
+	}
+	return bh;
+}
+EXPORT_SYMBOL(__getblk);
+
+struct buffer_head *
+__bread(struct block_device *bdev, sector_t block, int size)
+{
+	struct buffer_head *bh = __getblk(bdev, block, size);
+
+	if (bh) {
+		if (buffer_uptodate(bh))
+			return bh;
+		__brelse(bh);
+	}
+	bh = __bread_slow(bdev, block, size);
+	bh_lru_install(bh);
+	return bh;
+}
+EXPORT_SYMBOL(__bread);
+
+/*
+ * This is called rarely - at unmount.
+ */
+static void invalidate_bh_lrus(void)
+{
+	int cpu_idx;
+
+	for (cpu_idx = 0; cpu_idx < NR_CPUS; cpu_idx++)
+		spin_lock(&bh_lrus[cpu_idx].lock);
+	for (cpu_idx = 0; cpu_idx < NR_CPUS; cpu_idx++) {
+		int i;
+
+		for (i = 0; i < BH_LRU_SIZE; i++) {
+			brelse(bh_lrus[cpu_idx].bhs[i]);
+			bh_lrus[cpu_idx].bhs[i] = NULL;
+		}
+	}
+	for (cpu_idx = 0; cpu_idx < NR_CPUS; cpu_idx++)
+		spin_unlock(&bh_lrus[cpu_idx].lock);
+}
+
 void set_bh_page(struct buffer_head *bh,
 		struct page *page, unsigned long offset)
 {
@@ -2306,7 +2456,8 @@ static inline int buffer_busy(struct buffer_head *bh)
 		(bh->b_state & ((1 << BH_Dirty) | (1 << BH_Lock)));
 }
 
-static /*inline*/ int drop_buffers(struct page *page)
+static inline int
+drop_buffers(struct page *page, struct buffer_head **buffers_to_free)
 {
 	struct buffer_head *head = page_buffers(page);
 	struct buffer_head *bh;
@@ -2330,9 +2481,9 @@ static /*inline*/ int drop_buffers(struct page *page)
 
 		if (!list_empty(&bh->b_assoc_buffers))
 			__remove_assoc_queue(bh);
-		free_buffer_head(bh);
 		bh = next;
 	} while (bh != head);
+	*buffers_to_free = head;
 	__clear_page_buffers(page);
 	return 1;
 failed:
@@ -2342,17 +2493,20 @@ static /*inline*/ int drop_buffers(struct page *page)
 int try_to_free_buffers(struct page *page)
 {
 	struct address_space * const mapping = page->mapping;
+	struct buffer_head *buffers_to_free = NULL;
 	int ret = 0;
 
 	BUG_ON(!PageLocked(page));
 	if (PageWriteback(page))
 		return 0;
 
-	if (mapping == NULL)		/* swapped-in anon page */
-		return drop_buffers(page);
+	if (mapping == NULL) {		/* swapped-in anon page */
+		ret = drop_buffers(page, &buffers_to_free);
+		goto out;
+	}
 
 	spin_lock(&mapping->private_lock);
-	ret = drop_buffers(page);
+	ret = drop_buffers(page, &buffers_to_free);
 	if (ret && !PageSwapCache(page)) {
 		/*
 		 * If the filesystem writes its buffers by hand (eg ext3)
@@ -2365,6 +2519,16 @@ int try_to_free_buffers(struct page *page)
 		ClearPageDirty(page);
 	}
 	spin_unlock(&mapping->private_lock);
+out:
+	if (buffers_to_free) {
+		struct buffer_head *bh = buffers_to_free;
+
+		do {
+			struct buffer_head *next = bh->b_this_page;
+			free_buffer_head(bh);
+			bh = next;
+		} while (bh != buffers_to_free);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(try_to_free_buffers);
@@ -2435,6 +2599,9 @@ void __init buffer_init(void)
 {
 	int i;
 
+	for (i = 0; i < NR_CPUS; i++)
+		spin_lock_init(&bh_lrus[i].lock);
+
 	bh_cachep = kmem_cache_create("buffer_head",
 			sizeof(struct buffer_head), 0,
 			SLAB_HWCACHE_ALIGN, init_buffer_head, NULL);

fs/devpts/Makefile

@@ -4,6 +4,6 @@
 
 obj-$(CONFIG_DEVPTS_FS) += devpts.o
 
-devpts-objs := root.o inode.o
+devpts-objs := inode.o
 
 include $(TOPDIR)/Rules.make

fs/devpts/devpts_i.h

-/* -*- linux-c -*- --------------------------------------------------------- *
- *
- * linux/fs/devpts/devpts_i.h
- *
- *  Copyright 1998 H. Peter Anvin -- All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
- * ------------------------------------------------------------------------- */
-
-#include <linux/fs.h>
-#include <linux/tty.h>
-#include <linux/types.h>
-
-#define BUILDING_DEVPTS 1
-#include <linux/devpts_fs.h>
-
-struct devpts_sb_info {
-	u32 magic;
-	int setuid;
-	int setgid;
-	uid_t   uid;
-	gid_t   gid;
-	umode_t mode;
-
-	unsigned int max_ptys;
-	struct inode **inodes;
-};
-
-#define DEVPTS_SUPER_MAGIC 0x1cd1
-#define DEVPTS_SBI_MAGIC   0x01da1d02
-
-extern inline struct devpts_sb_info *SBI(struct super_block *sb)
-{
-	return (struct devpts_sb_info *)(sb->u.generic_sbp);
-}
-
-extern struct inode_operations devpts_root_inode_operations;
-extern struct file_operations devpts_root_operations;

fs/devpts/inode.c

@@ -11,135 +11,70 @@
  * ------------------------------------------------------------------------- */
 
 #include <linux/module.h>
-
-#include <linux/string.h>
-#include <linux/fs.h>
 #include <linux/init.h>
-#include <linux/kdev_t.h>
-#include <linux/kernel.h>
-#include <linux/major.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/tty.h>
-#include <asm/bitops.h>
-#include <asm/uaccess.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/namei.h>
 
-#include "devpts_i.h"
+#define DEVPTS_SUPER_MAGIC 0x1cd1
 
 static struct vfsmount *devpts_mnt;
+static struct dentry *devpts_root;
 
-static void devpts_put_super(struct super_block *sb)
-{
-	struct devpts_sb_info *sbi = SBI(sb);
-	struct inode *inode;
-	int i;
+static struct {
+	int setuid;
+	int setgid;
+	uid_t   uid;
+	gid_t   gid;
+	umode_t mode;
+} config = {mode: 0600};
 
-	for ( i = 0 ; i < sbi->max_ptys ; i++ ) {
-		if ( (inode = sbi->inodes[i]) ) {
-			if ( atomic_read(&inode->i_count) != 1 )
-				printk("devpts_put_super: badness: entry %d count %d\n",
-				       i, atomic_read(&inode->i_count));
-			inode->i_nlink--;
-			iput(inode);
-		}
-	}
-	kfree(sbi->inodes);
-	kfree(sbi);
-}
-
-static int devpts_remount (struct super_block * sb, int * flags, char * data);
-
-static struct super_operations devpts_sops = {
-	put_super:	devpts_put_super,
-	statfs:		simple_statfs,
-	remount_fs:	devpts_remount,
-};
-
-static int devpts_parse_options(char *options, struct devpts_sb_info *sbi)
+static int devpts_remount(struct super_block *sb, int *flags, char *data)
 {
 	int setuid = 0;
 	int setgid = 0;
 	uid_t uid = 0;
 	gid_t gid = 0;
 	umode_t mode = 0600;
-	char *this_char, *value;
+	char *this_char;
 
 	this_char = NULL;
-	while ((this_char = strsep(&options, ",")) != NULL) {
+	while ((this_char = strsep(&data, ",")) != NULL) {
+		int n;
+		char dummy;
 		if (!*this_char)
 			continue;
-		if ((value = strchr(this_char,'=')) != NULL)
-			*value++ = 0;
-		if (!strcmp(this_char,"uid")) {
-			if (!value || !*value)
-				return 1;
-			uid = simple_strtoul(value,&value,0);
-			if (*value)
-				return 1;
+		if (sscanf(this_char, "uid=%i%c", &n, &dummy) == 1) {
 			setuid = 1;
-		}
-		else if (!strcmp(this_char,"gid")) {
-			if (!value || !*value)
-				return 1;
-			gid = simple_strtoul(value,&value,0);
-			if (*value)
-				return 1;
+			uid = n;
+		} else if (sscanf(this_char, "gid=%i%c", &n, &dummy) == 1) {
 			setgid = 1;
+			gid = n;
+		} else if (sscanf(this_char, "mode=%o%c", &n, &dummy) == 1)
+			mode = n & ~S_IFMT;
+		else {
+			printk("devpts: called with bogus options\n");
+			return -EINVAL;
 		}
-		else if (!strcmp(this_char,"mode")) {
-			if (!value || !*value)
-				return 1;
-			mode = simple_strtoul(value,&value,8);
-			if (*value)
-				return 1;
-		}
-		else
-			return 1;
 	}
-	sbi->setuid  = setuid;
-	sbi->setgid  = setgid;
-	sbi->uid     = uid;
-	sbi->gid     = gid;
-	sbi->mode    = mode & ~S_IFMT;
+	config.setuid  = setuid;
+	config.setgid  = setgid;
+	config.uid     = uid;
+	config.gid     = gid;
+	config.mode    = mode;
 
 	return 0;
 }
 
-static int devpts_remount(struct super_block * sb, int * flags, char * data)
-{
-	struct devpts_sb_info *sbi = sb->u.generic_sbp;
-	int res = devpts_parse_options(data,sbi);
-	if (res) {
-		printk("devpts: called with bogus options\n");
-		return -EINVAL;
-	}
-	return 0;
-}
+static struct super_operations devpts_sops = {
+	statfs:		simple_statfs,
+	remount_fs:	devpts_remount,
+};
 
 static int devpts_fill_super(struct super_block *s, void *data, int silent)
 {
-	int error = -ENOMEM;
 	struct inode * inode;
-	struct devpts_sb_info *sbi;
-
-	sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
-	if ( !sbi )
-		goto fail;
-	memset(sbi, 0, sizeof(*sbi));
-
-	sbi->magic  = DEVPTS_SBI_MAGIC;
-	sbi->max_ptys = unix98_max_ptys;
-	sbi->inodes = kmalloc(sizeof(struct inode *) * sbi->max_ptys, GFP_KERNEL);
-	if ( !sbi->inodes )
-		goto fail_free;
-	memset(sbi->inodes, 0, sizeof(struct inode *) * sbi->max_ptys);
 
-	if ( devpts_parse_options(data,sbi) && !silent) {
-		error = -EINVAL;
-		printk("devpts: called with bogus options\n");
-		goto fail_free;
-	}
-	s->u.generic_sbp = (void *) sbi;
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;
 	s->s_magic = DEVPTS_SUPER_MAGIC;
@@ -147,27 +82,25 @@ static int devpts_fill_super(struct super_block *s, void *data, int silent)
 
 	inode = new_inode(s);
 	if (!inode)
-		goto fail_free;
+		goto fail;
 	inode->i_ino = 1;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	inode->i_blocks = 0;
 	inode->i_blksize = 1024;
 	inode->i_uid = inode->i_gid = 0;
 	inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR;
-	inode->i_op = &devpts_root_inode_operations;
-	inode->i_fop = &devpts_root_operations;
+	inode->i_op = &simple_dir_inode_operations;
+	inode->i_fop = &simple_dir_operations;
 	inode->i_nlink = 2;
 
-	s->s_root = d_alloc_root(inode);
+	devpts_root = s->s_root = d_alloc_root(inode);
 	if (s->s_root)
 		return 0;
 	
 	printk("devpts: get root dentry failed\n");
 	iput(inode);
-fail_free:
-	kfree(sbi);
 fail:
-	return error;
+	return -ENOMEM;
 }
 
 static struct super_block *devpts_get_sb(struct file_system_type *fs_type,
@@ -183,44 +116,52 @@ static struct file_system_type devpts_fs_type = {
 	kill_sb:	kill_anon_super,
 };
 
-void devpts_pty_new(int number, kdev_t device)
+/*
+ * The normal naming convention is simply /dev/pts/<number>; this conforms
+ * to the System V naming convention
+ */
+
+static struct dentry *get_node(int num)
 {
-	struct super_block *sb = devpts_mnt->mnt_sb;
-	struct devpts_sb_info *sbi = SBI(sb);
-	struct inode *inode;
-		
-	if ( sbi->inodes[number] )
-		return; /* Already registered, this does happen */
-		
-	inode = new_inode(sb);
+	char s[10];
+	struct dentry *root = devpts_root;
+	down(&root->d_inode->i_sem);
+	return lookup_one_len(s, root, sprintf(s, "%d", num));
+}
+
+void devpts_pty_new(int number, dev_t device)
+{
+	struct dentry *dentry;
+	struct inode *inode = new_inode(devpts_mnt->mnt_sb);
 	if (!inode)
 		return;
 	inode->i_ino = number+2;
-	inode->i_blocks = 0;
 	inode->i_blksize = 1024;
-	inode->i_uid = sbi->setuid ? sbi->uid : current->fsuid;
-	inode->i_gid = sbi->setgid ? sbi->gid : current->fsgid;
+	inode->i_uid = config.setuid ? config.uid : current->fsuid;
+	inode->i_gid = config.setgid ? config.gid : current->fsgid;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-	init_special_inode(inode, S_IFCHR|sbi->mode, kdev_t_to_nr(device));
+	init_special_inode(inode, S_IFCHR|config.mode, device);
 
-	if ( sbi->inodes[number] ) {
-		iput(inode);
-		return;
-	}
-	sbi->inodes[number] = inode;
+	dentry = get_node(number);
+	if (!IS_ERR(dentry) && !dentry->d_inode)
+		d_instantiate(dentry, inode);
+	up(&devpts_root->d_inode->i_sem);
 }
 
 void devpts_pty_kill(int number)
 {
-	struct super_block *sb = devpts_mnt->mnt_sb;
-	struct devpts_sb_info *sbi = SBI(sb);
-	struct inode *inode = sbi->inodes[number];
+	struct dentry *dentry = get_node(number);
 
-	if ( inode ) {
-		sbi->inodes[number] = NULL;
-		inode->i_nlink--;
-		iput(inode);
+	if (!IS_ERR(dentry)) {
+		struct inode *inode = dentry->d_inode;
+		if (inode) {
+			inode->i_nlink--;
+			d_delete(dentry);
+			dput(dentry);
+		}
+		dput(dentry);
 	}
+	up(&devpts_root->d_inode->i_sem);
 }
 
 static int __init init_devpts_fs(void)
@@ -231,22 +172,12 @@ static int __init init_devpts_fs(void)
 		err = PTR_ERR(devpts_mnt);
 		if (!IS_ERR(devpts_mnt))
 			err = 0;
-#ifdef MODULE
-		if ( !err ) {
-			devpts_upcall_new  = devpts_pty_new;
-			devpts_upcall_kill = devpts_pty_kill;
-		}
-#endif
 	}
 	return err;
 }
 
 static void __exit exit_devpts_fs(void)
 {
-#ifdef MODULE
-	devpts_upcall_new  = NULL;
-	devpts_upcall_kill = NULL;
-#endif
 	unregister_filesystem(&devpts_fs_type);
 	kern_umount(devpts_mnt);
 }
@@ -254,4 +185,3 @@ static void __exit exit_devpts_fs(void)
 module_init(init_devpts_fs)
 module_exit(exit_devpts_fs)
 MODULE_LICENSE("GPL");
-

fs/devpts/root.c

-/* -*- linux-c -*- --------------------------------------------------------- *
- *
- * linux/fs/devpts/root.c
- *
- *  Copyright 1998 H. Peter Anvin -- All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
- * ------------------------------------------------------------------------- */
-
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include "devpts_i.h"
-
-static int devpts_root_readdir(struct file *,void *,filldir_t);
-static struct dentry *devpts_root_lookup(struct inode *,struct dentry *);
-static int devpts_revalidate(struct dentry *, int);
-
-struct file_operations devpts_root_operations = {
-	read:		generic_read_dir,
-	readdir:	devpts_root_readdir,
-};
-
-struct inode_operations devpts_root_inode_operations = {
-	lookup:		devpts_root_lookup,
-};
-
-static struct dentry_operations devpts_dentry_operations = {
-	d_revalidate:	devpts_revalidate,
-};
-
-/*
- * The normal naming convention is simply /dev/pts/<number>; this conforms
- * to the System V naming convention
- */
-
-#define genptsname(buf,num) sprintf(buf, "%d", num)
-
-static int devpts_root_readdir(struct file *filp, void *dirent, filldir_t filldir)
-{
-	struct inode * inode = filp->f_dentry->d_inode;
-	struct devpts_sb_info * sbi = SBI(filp->f_dentry->d_inode->i_sb);
-	off_t nr;
-	char numbuf[16];
-
-	lock_kernel();
-
-	nr = filp->f_pos;
-
-	switch(nr)
-	{
-	case 0:
-		if (filldir(dirent, ".", 1, nr, inode->i_ino, DT_DIR) < 0)
-			goto out;
-		filp->f_pos = ++nr;
-		/* fall through */
-	case 1:
-		if (filldir(dirent, "..", 2, nr, inode->i_ino, DT_DIR) < 0)
-			goto out;
-		filp->f_pos = ++nr;
-		/* fall through */
-	default:
-		while ( nr - 2 < sbi->max_ptys ) {
-			int ptynr = nr - 2;
-			if ( sbi->inodes[ptynr] ) {
-				genptsname(numbuf, ptynr);
-				if ( filldir(dirent, numbuf, strlen(numbuf), nr, nr, DT_CHR) < 0 )
-					goto out;
-			}
-			filp->f_pos = ++nr;
-		}
-		break;
-	}
-
-out:
-	unlock_kernel();
-	return 0;
-}
-
-/*
- * Revalidate is called on every cache lookup.  We use it to check that
- * the pty really does still exist.  Never revalidate negative dentries;
- * for simplicity (fix later?)
- */
-static int devpts_revalidate(struct dentry * dentry, int flags)
-{
-	struct devpts_sb_info *sbi;
-
-	if ( !dentry->d_inode )
-		return 0;
-
-	sbi = SBI(dentry->d_inode->i_sb);
-
-	return ( sbi->inodes[dentry->d_inode->i_ino - 2] == dentry->d_inode );
-}
-
-static struct dentry *devpts_root_lookup(struct inode * dir, struct dentry * dentry)
-{
-	struct devpts_sb_info *sbi = SBI(dir->i_sb);
-	unsigned int entry;
-	int i;
-	const char *p;
-
-	dentry->d_op    = &devpts_dentry_operations;
-
-	if ( dentry->d_name.len == 1 && dentry->d_name.name[0] == '0' ) {
-		entry = 0;
-	} else if ( dentry->d_name.len < 1 ) {
-		return NULL;
-	} else {
-		p = dentry->d_name.name;
-		if ( *p < '1' || *p > '9' )
-			return NULL;
-		entry = *p++ - '0';
-
-		for ( i = dentry->d_name.len-1 ; i ; i-- ) {
-			unsigned int nentry = *p++ - '0';
-			if ( nentry > 9 )
-				return NULL;
-			if ( entry >= ~0U/10 )
-				return NULL;
-			entry = nentry + entry * 10;
-		}
-	}
-
-	if ( entry >= sbi->max_ptys )
-		return NULL;
-
-	lock_kernel();
-	if ( sbi->inodes[entry] )
-		atomic_inc(&sbi->inodes[entry]->i_count);
-	
-	d_add(dentry, sbi->inodes[entry]);
-	unlock_kernel();
-
-	return NULL;
-}

fs/ext2/ialloc.c

@@ -30,8 +30,7 @@
  *
  * The file system contains group descriptors which are located after the
  * super block.  Each descriptor contains the number of the bitmap block and
- * the free blocks count in the block.  The descriptors are loaded in memory
- * when a file system is mounted (see ext2_read_super).
+ * the free blocks count in the block.
  */
 
 
@@ -41,8 +40,8 @@
  *
  * Return buffer_head of bitmap on success or NULL.
  */
-static struct buffer_head *read_inode_bitmap (struct super_block * sb,
-					       unsigned long block_group)
+static struct buffer_head *
+read_inode_bitmap(struct super_block * sb, unsigned long block_group)
 {
 	struct ext2_group_desc *desc;
 	struct buffer_head *bh = NULL;
@@ -53,7 +52,7 @@ static struct buffer_head *read_inode_bitmap (struct super_block * sb,
 
 	bh = sb_bread(sb, le32_to_cpu(desc->bg_inode_bitmap));
 	if (!bh)
-		ext2_error (sb, "read_inode_bitmap",
+		ext2_error(sb, "read_inode_bitmap",
 			    "Cannot read inode bitmap - "
 			    "block_group = %lu, inode_bitmap = %lu",
 			    block_group, (unsigned long) desc->bg_inode_bitmap);
@@ -61,75 +60,6 @@ static struct buffer_head *read_inode_bitmap (struct super_block * sb,
 	return bh;
 }
 
-/*
- * load_inode_bitmap loads the inode bitmap for a blocks group
- *
- * It maintains a cache for the last bitmaps loaded.  This cache is managed
- * with a LRU algorithm.
- *
- * Notes:
- * 1/ There is one cache per mounted file system.
- * 2/ If the file system contains less than EXT2_MAX_GROUP_LOADED groups,
- *    this function reads the bitmap without maintaining a LRU cache.
- * 
- * Return the buffer_head of the bitmap or the ERR_PTR(error)
- */
-static struct buffer_head *load_inode_bitmap (struct super_block * sb,
-					      unsigned int block_group)
-{
-	int i, slot = 0;
-	struct ext2_sb_info *sbi = EXT2_SB(sb);
-	struct buffer_head *bh = sbi->s_inode_bitmap[0];
-
-	if (block_group >= sbi->s_groups_count)
-		ext2_panic (sb, "load_inode_bitmap",
-			    "block_group >= groups_count - "
-			    "block_group = %d, groups_count = %lu",
-			     block_group, sbi->s_groups_count);
-
-	if (sbi->s_loaded_inode_bitmaps > 0 &&
-	    sbi->s_inode_bitmap_number[0] == block_group && bh)
-		goto found;
-
-	if (sbi->s_groups_count <= EXT2_MAX_GROUP_LOADED) {
-		slot = block_group;
-		bh = sbi->s_inode_bitmap[slot];
-		if (!bh)
-			goto read_it;
-		if (sbi->s_inode_bitmap_number[slot] == slot)
-			goto found;
-		ext2_panic (sb, "load_inode_bitmap",
-			    "block_group != inode_bitmap_number");
-	}
-
-	bh = NULL;
-	for (i = 0; i < sbi->s_loaded_inode_bitmaps &&
-		    sbi->s_inode_bitmap_number[i] != block_group;
-	     i++)
-		;
-	if (i < sbi->s_loaded_inode_bitmaps)
-		bh = sbi->s_inode_bitmap[i];
-	else if (sbi->s_loaded_inode_bitmaps < EXT2_MAX_GROUP_LOADED)
-		sbi->s_loaded_inode_bitmaps++;
-	else
-		brelse (sbi->s_inode_bitmap[--i]);
-
-	while (i--) {
-		sbi->s_inode_bitmap_number[i+1] = sbi->s_inode_bitmap_number[i];
-		sbi->s_inode_bitmap[i+1] = sbi->s_inode_bitmap[i];
-	}
-
-read_it:
-	if (!bh)
-		bh = read_inode_bitmap (sb, block_group);
-	sbi->s_inode_bitmap_number[slot] = block_group;
-	sbi->s_inode_bitmap[slot] = bh;
-	if (!bh)
-		return ERR_PTR(-EIO);
-found:
-	return bh;
-}
-
 /*
  * NOTE! When we get the inode, we're the only people
  * that have access to it, and as such there are no
@@ -151,8 +81,8 @@ void ext2_free_inode (struct inode * inode)
 	struct super_block * sb = inode->i_sb;
 	int is_directory;
 	unsigned long ino;
-	struct buffer_head * bh;
-	struct buffer_head * bh2;
+	struct buffer_head *bitmap_bh = NULL;
+	struct buffer_head *bh2;
 	unsigned long block_group;
 	unsigned long bit;
 	struct ext2_group_desc * desc;
@@ -186,12 +116,13 @@ void ext2_free_inode (struct inode * inode)
 	}
 	block_group = (ino - 1) / EXT2_INODES_PER_GROUP(sb);
 	bit = (ino - 1) % EXT2_INODES_PER_GROUP(sb);
-	bh = load_inode_bitmap (sb, block_group);
-	if (IS_ERR(bh))
+	brelse(bitmap_bh);
+	bitmap_bh = read_inode_bitmap(sb, block_group);
+	if (!bitmap_bh)
 		goto error_return;
 
 	/* Ok, now we can actually update the inode bitmaps.. */
-	if (!ext2_clear_bit (bit, bh->b_data))
+	if (!ext2_clear_bit(bit, bitmap_bh->b_data))
 		ext2_error (sb, "ext2_free_inode",
 			      "bit already cleared for inode %lu", ino);
 	else {
@@ -208,13 +139,14 @@ void ext2_free_inode (struct inode * inode)
 			cpu_to_le32(le32_to_cpu(es->s_free_inodes_count) + 1);
 		mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
 	}
-	mark_buffer_dirty(bh);
+	mark_buffer_dirty(bitmap_bh);
 	if (sb->s_flags & MS_SYNCHRONOUS) {
-		ll_rw_block (WRITE, 1, &bh);
-		wait_on_buffer (bh);
+		ll_rw_block(WRITE, 1, &bitmap_bh);
+		wait_on_buffer(bitmap_bh);
 	}
 	sb->s_dirt = 1;
 error_return:
+	brelse(bitmap_bh);
 	unlock_super (sb);
 }
 
@@ -351,9 +283,9 @@ static int find_group_other(struct super_block *sb, int parent_group)
 
 struct inode * ext2_new_inode(struct inode * dir, int mode)
 {
-	struct super_block * sb;
-	struct buffer_head * bh;
-	struct buffer_head * bh2;
+	struct super_block *sb;
+	struct buffer_head *bitmap_bh = NULL;
+	struct buffer_head *bh2;
 	int group, i;
 	ino_t ino;
 	struct inode * inode;
@@ -361,6 +293,7 @@ struct inode * ext2_new_inode(struct inode * dir, int mode)
 	struct ext2_super_block * es;
 	struct ext2_inode_info *ei;
 	int err;
+	struct inode *ret;
 
 	sb = dir->i_sb;
 	inode = new_inode(sb);
@@ -381,20 +314,21 @@ struct inode * ext2_new_inode(struct inode * dir, int mode)
 		goto fail;
 
 	err = -EIO;
-	bh = load_inode_bitmap (sb, group);
-	if (IS_ERR(bh))
+	brelse(bitmap_bh);
+	bitmap_bh = read_inode_bitmap(sb, group);
+	if (!bitmap_bh)
 		goto fail2;
 
-	i = ext2_find_first_zero_bit ((unsigned long *) bh->b_data,
+	i = ext2_find_first_zero_bit((unsigned long *)bitmap_bh->b_data,
 				      EXT2_INODES_PER_GROUP(sb));
 	if (i >= EXT2_INODES_PER_GROUP(sb))
 		goto bad_count;
-	ext2_set_bit (i, bh->b_data);
+	ext2_set_bit(i, bitmap_bh->b_data);
 
-	mark_buffer_dirty(bh);
+	mark_buffer_dirty(bitmap_bh);
 	if (sb->s_flags & MS_SYNCHRONOUS) {
-		ll_rw_block (WRITE, 1, &bh);
-		wait_on_buffer (bh);
+		ll_rw_block(WRITE, 1, &bitmap_bh);
+		wait_on_buffer(bitmap_bh);
 	}
 
 	ino = group * EXT2_INODES_PER_GROUP(sb) + i + 1;
@@ -452,17 +386,19 @@ struct inode * ext2_new_inode(struct inode * dir, int mode)
 	insert_inode_hash(inode);
 	mark_inode_dirty(inode);
 
-	unlock_super (sb);
+	unlock_super(sb);
+	ret = inode;
 	if(DQUOT_ALLOC_INODE(inode)) {
 		DQUOT_DROP(inode);
 		inode->i_flags |= S_NOQUOTA;
 		inode->i_nlink = 0;
 		iput(inode);
-		return ERR_PTR(-EDQUOT);
+		ret = ERR_PTR(-EDQUOT);
+	} else {
+		ext2_debug("allocating inode %lu\n", inode->i_ino);
+		ext2_preread_inode(inode);
 	}
-	ext2_debug ("allocating inode %lu\n", inode->i_ino);
-	ext2_preread_inode(inode);
-	return inode;
+	goto out;
 
 fail2:
 	desc = ext2_get_group_desc (sb, group, &bh2);
@@ -476,7 +412,8 @@ struct inode * ext2_new_inode(struct inode * dir, int mode)
 	unlock_super(sb);
 	make_bad_inode(inode);
 	iput(inode);
-	return ERR_PTR(err);
+	ret = ERR_PTR(err);
+	goto out;
 
 bad_count:
 	ext2_error (sb, "ext2_new_inode",
@@ -491,6 +428,9 @@ struct inode * ext2_new_inode(struct inode * dir, int mode)
 	desc->bg_free_inodes_count = 0;
 	mark_buffer_dirty(bh2);
 	goto repeat;
+out:
+	brelse(bitmap_bh);
+	return ret;
 }
 
 unsigned long ext2_count_free_inodes (struct super_block * sb)
@@ -498,30 +438,33 @@ unsigned long ext2_count_free_inodes (struct super_block * sb)
 #ifdef EXT2FS_DEBUG
 	struct ext2_super_block * es;
 	unsigned long desc_count = 0, bitmap_count = 0;
+	struct buffer_head *bitmap_bh = NULL;
 	int i;
 
 	lock_super (sb);
 	es = EXT2_SB(sb)->s_es;
 	for (i = 0; i < EXT2_SB(sb)->s_groups_count; i++) {
-		struct ext2_group_desc *desc = ext2_get_group_desc (sb, i, NULL);
-		struct buffer_head *bh;
+		struct ext2_group_desc *desc;
 		unsigned x;
 
+		desc = ext2_get_group_desc (sb, i, NULL);
 		if (!desc)
 			continue;
 		desc_count += le16_to_cpu(desc->bg_free_inodes_count);
-		bh = load_inode_bitmap (sb, i);
-		if (IS_ERR(bh))
+		brelse(bitmap_bh);
+		bitmap_bh = read_inode_bitmap(sb, i);
+		if (!bitmap_bh)
 			continue;
 
-		x = ext2_count_free (bh, EXT2_INODES_PER_GROUP(sb) / 8);
+		x = ext2_count_free(bitmap_bh, EXT2_INODES_PER_GROUP(sb) / 8);
 		printk ("group %d: stored = %d, counted = %lu\n",
 			i, le16_to_cpu(desc->bg_free_inodes_count), x);
 		bitmap_count += x;
 	}
+	brelse(bitmap_bh);
 	printk("ext2_count_free_inodes: stored = %lu, computed = %lu, %lu\n",
 		le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
-	unlock_super (sb);
+	unlock_super(sb);
 	return desc_count;
 #else
 	return le32_to_cpu(EXT2_SB(sb)->s_es->s_free_inodes_count);
@@ -534,21 +477,23 @@ void ext2_check_inodes_bitmap (struct super_block * sb)
 {
 	struct ext2_super_block * es = EXT2_SB(sb)->s_es;
 	unsigned long desc_count = 0, bitmap_count = 0;
+	struct buffer_head *bitmap_bh = NULL;
 	int i;
 
 	for (i = 0; i < EXT2_SB(sb)->s_groups_count; i++) {
-		struct ext2_group_desc *desc = ext2_get_group_desc(sb, i, NULL);
-		struct buffer_head *bh;
+		struct ext2_group_desc *desc;
 		unsigned x;
 
+		desc = ext2_get_group_desc(sb, i, NULL);
 		if (!desc)
 			continue;
 		desc_count += le16_to_cpu(desc->bg_free_inodes_count);
-		bh = load_inode_bitmap (sb, i);
-		if (IS_ERR(bh))
+		brelse(bitmap_bh);
+		bitmap_bh = read_inode_bitmap(sb, i);
+		if (!bitmap_bh)
 			continue;
 		
-		x = ext2_count_free (bh, EXT2_INODES_PER_GROUP(sb) / 8);
+		x = ext2_count_free(bitmap_bh, EXT2_INODES_PER_GROUP(sb) / 8);
 		if (le16_to_cpu(desc->bg_free_inodes_count) != x)
 			ext2_error (sb, "ext2_check_inodes_bitmap",
 				    "Wrong free inodes count in group %d, "
@@ -556,8 +501,9 @@ void ext2_check_inodes_bitmap (struct super_block * sb)
 				    le16_to_cpu(desc->bg_free_inodes_count), x);
 		bitmap_count += x;
 	}
+	brelse(bitmap_bh);
 	if (le32_to_cpu(es->s_free_inodes_count) != bitmap_count)
-		ext2_error (sb, "ext2_check_inodes_bitmap",
+		ext2_error(sb, "ext2_check_inodes_bitmap",
 			    "Wrong free inodes count in super block, "
 			    "stored = %lu, counted = %lu",
 			    (unsigned long)le32_to_cpu(es->s_free_inodes_count),

fs/ext2/super.c

@@ -142,12 +142,6 @@ static void ext2_put_super (struct super_block * sb)
 		if (sbi->s_group_desc[i])
 			brelse (sbi->s_group_desc[i]);
 	kfree(sbi->s_group_desc);
-	for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
-		if (sbi->s_inode_bitmap[i])
-			brelse (sbi->s_inode_bitmap[i]);
-	for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
-		if (sbi->s_block_bitmap[i])
-			brelse (sbi->s_block_bitmap[i]);
 	brelse (sbi->s_sbh);
 	sb->u.generic_sbp = NULL;
 	kfree(sbi);
@@ -686,14 +680,6 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 		db_count = i;
 		goto failed_mount2;
 	}
-	for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
-		sbi->s_inode_bitmap_number[i] = 0;
-		sbi->s_inode_bitmap[i] = NULL;
-		sbi->s_block_bitmap_number[i] = 0;
-		sbi->s_block_bitmap[i] = NULL;
-	}
-	sbi->s_loaded_inode_bitmaps = 0;
-	sbi->s_loaded_block_bitmaps = 0;
 	sbi->s_gdb_count = db_count;
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	/*

fs/ext3/inode.c

@@ -1632,8 +1632,10 @@ ext3_clear_blocks(handle_t *handle, struct inode *inode, struct buffer_head *bh,
 		}
 		ext3_mark_inode_dirty(handle, inode);
 		ext3_journal_test_restart(handle, inode);
-		BUFFER_TRACE(bh, "get_write_access");
-		ext3_journal_get_write_access(handle, bh);
+		if (bh) {
+			BUFFER_TRACE(bh, "retaking write access");
+			ext3_journal_get_write_access(handle, bh);
+		}
 	}
 
 	/*

fs/ext3/super.c

@@ -417,10 +417,6 @@ void ext3_put_super (struct super_block * sb)
 	for (i = 0; i < sbi->s_gdb_count; i++)
 		brelse(sbi->s_group_desc[i]);
 	kfree(sbi->s_group_desc);
-	for (i = 0; i < EXT3_MAX_GROUP_LOADED; i++)
-		brelse(sbi->s_inode_bitmap[i]);
-	for (i = 0; i < EXT3_MAX_GROUP_LOADED; i++)
-		brelse(sbi->s_block_bitmap[i]);
 	brelse(sbi->s_sbh);
 
 	/* Debugging code just in case the in-memory inode orphan list
@@ -1150,14 +1146,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		printk (KERN_ERR "EXT3-fs: group descriptors corrupted !\n");
 		goto failed_mount2;
 	}
-	for (i = 0; i < EXT3_MAX_GROUP_LOADED; i++) {
-		sbi->s_inode_bitmap_number[i] = 0;
-		sbi->s_inode_bitmap[i] = NULL;
-		sbi->s_block_bitmap_number[i] = 0;
-		sbi->s_block_bitmap[i] = NULL;
-	}
-	sbi->s_loaded_inode_bitmaps = 0;
-	sbi->s_loaded_block_bitmaps = 0;
 	sbi->s_gdb_count = db_count;
 	/*
 	 * set up enough so that it can read an inode

fs/fcntl.c

@@ -245,6 +245,11 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 	}
 
 	if (arg & O_DIRECT) {
+		if (inode->i_mapping && inode->i_mapping->a_ops) {
+			if (!inode->i_mapping->a_ops->direct_IO)
+				return -EINVAL;
+		}
+
 		/*
 		 * alloc_kiovec() can sleep and we are only serialized by
 		 * the big kernel lock here, so abuse the i_sem to serialize

fs/inode.c

@@ -101,7 +101,7 @@ static struct inode *alloc_inode(struct super_block *sb)
 		struct address_space * const mapping = &inode->i_data;
 
 		inode->i_sb = sb;
-		inode->i_dev = to_kdev_t(sb->s_dev);
+		inode->i_dev = sb->s_dev;
 		inode->i_blkbits = sb->s_blocksize_bits;
 		inode->i_flags = 0;
 		atomic_set(&inode->i_count, 1);